<html>
  <?php
    // a single line comment
    function /* this is a function! */
    my_function($arg0, /* comment within a parameter */
    $arg1 = null) /* comment after a function */ {
      // comment before a statement
      return "42"; // comment after a statement
      return "43";
      // comment on a new line
    }
    echo my_function(/* empty arg */);
    /* /* */
    /* // */
    // /*
    /* a comment
    that spans multiple lines */
    /* a comment
    which is indented */
    /*            */
    /**
     * java doc comment
     */ ?>
  <body>
    <h1>Hello, world!</h1>
    /* comment in html - unparsed */
  </body>
</html>